Above is an early example housed in a fairly rare solid mahogany case. The actual mechanism itself is virtually the same as the one shown at the bottom of the page, which was produced nearly 40 years later, near the end of production.

Interior of the 1935 Gents

This was most likely the top of their range at the time of purchase as most cases were built of Oak with the interior painted black. The beautifully polished interior and exterior mahogany of this case was certainly intended to be seen.

Rear of dial 1935 Gents

A later 1973 Gents Master Clock

This is a fairly late example as it was built around 1973, having gone into service at an electricity sub station near Ipswich. The BST sign in the door reverses to show GMT when British Summer Time is no longer operating.

Gone are the architecturally pleasing cases of early models, being replaced now with this rather 'boxy' looking case.

The pendulum rod is a flat bar of Invar, a metal that shows far less expansion due to temperature changes than does steel. The bob is just a lead filled steel cylinder painted black.
The rheostat that you can see is for varying the current through the magnet's reset coils. This is needed because the slave clocks, like the Synchronome system, are all wired in series with the clock. As the current will vary each time a new slave clock is added, a rheostat is needed to adjust the current back to its correct level.

The cord hanging down with a ring in the end is to operate the advance and retard mechanism.